Dual detection of biochemical oxygen demand and nitrate in water based on bidirectional Shewanella loihica electron transfer
| Autor: | Yue Yi, Hong Liu, Beizhen Xie, Yuxuan Zang, Ting Zhao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Biochemical oxygen demand Shewanella Environmental Engineering Bioelectric Energy Sources Shewanella loihica Analytical chemistry Bioengineering Electrons 010501 environmental sciences 01 natural sciences Electron Transport Electron transfer chemistry.chemical_compound Nitrate 010608 biotechnology Waste Management and Disposal Electrodes 0105 earth and related environmental sciences biology Renewable Energy Sustainability and the Environment Chemistry Biofilm Water General Medicine biology.organism_classification Water based Oxygen Biosensor Bacteria |
| Zdroj: | Bioresource technology. 309 |
| ISSN: | 1873-2976 |
| Popis: | This study for the first time proposed a method for simultaneously measuring BOD and nitrate in water using electrochemically active bacteria. Firstly, the bidirectional extracellular electron transfer (EET) capability of a model electricigen Shewanella loihica PV-4 was revealed. Then, based on the respective outward and inward EET, S. loihica PV-4 was utilized to detection BOD and nitrate. The results demonstrated a positive correlation between the outward EET and BOD (from 0 mg/L to 435 mg/L) while a negative correlation between the inward EET and nitrate (from 0 mg/L to 7 mg/L); both the relationships were well fitted by the combination of traditional linear model and Michaelis-Menten model (R2 > 0.96). Finally, a dual detection method for BOD and nitrate measurements was established based on the ano-cathodophilic capability of S. loihica PV-4 biofilm, and exhibited the characteristics of high accuracy (>80%) and fast analysis ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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